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Weird whining noise and power loss on 2021 Kicks

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Chris P. · rep 0 · May 22, 2:48 AM · 1 replies · solved · Question

Vehicle: 2021 Nissan Kicks SV

My 2021 Nissan Kicks SV, with about 40,000 miles, has started making a strange whining noise, especially noticeable when accelerating. It sounds like it's coming from the engine bay. Along with this, I've felt a noticeable drop in power, almost like the engine is struggling more than it should. There's no check engine light on yet, but I'm getting worried.

It's a 1.6L engine, and I've kept up with all the maintenance. Could this be related to the CVT again, or something else entirely? The noise changes with RPMs. Any thoughts?

✓ Accepted solution

ClearTheCode Admin

ClearTheCode Team · rep 0 · May 22, 2:48 AM

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Hi Chris,

A whining noise that changes with RPMs, coupled with a loss of power on your 2021 Nissan Kicks, can indicate a few different issues within the engine or drivetrain. While the Kicks does use a CVT, the specific symptoms suggest we should look beyond just the transmission initially.

Here are some potential causes:

  1. Accessory Belt/Pulley Issues:

    • Cause: A worn or loose serpentine belt, or a failing pulley (like the idler pulley, tensioner pulley, or even an alternator/power steering pump pulley), can produce a whining sound. If an accessory is seizing, it can also put a drag on the engine, leading to perceived power loss.

  2. CVT (Continuously Variable Transmission) Issues:

    • Cause: While the Kicks CVT is generally reliable, internal wear or low fluid levels can sometimes cause whining noises and power loss. This is less common without a check engine light or shuddering, but still a possibility.

  3. Engine Internal Issues (Less Likely without CEL):

    • Timing Chain: A stretched or failing timing chain can sometimes produce a whining or rattling noise, and could affect engine timing, leading to power loss. This is a more serious concern.
    • Turbocharger (if equipped): If your Kicks had a turbo (which the 1.6L in the Kicks typically does not, but some Nissan engines do), a failing turbocharger could whine and cause power loss.

When to See a Shop:

  • Soon: It's important to get this checked out relatively quickly. A failing accessory component could seize and cause further damage, and internal engine or transmission issues can worsen rapidly.
  • What they'll do: A technician will likely start by inspecting the serpentine belt and all accessory pulleys for wear or play. They'll listen to the engine with a stethoscope to pinpoint the source of the whine. If the accessories are ruled out, they will then investigate the CVT fluid level and condition, and potentially look into engine internals if other diagnostics come up empty. Since there's no CEL, a visual and auditory inspection will be key.
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